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Drayton Zone Valve Actuator Buzzing

Discussion in 'Plumbing and Central Heating' started by MarkTen, 17 Jan 2011.

  1. MarkTen

    MarkTen

    Joined:
    17 Jan 2011
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    Location:
    Gloucestershire
    Country:
    United Kingdom
    Hi - hope someone can help. Before Christmas we heard a buzzing noise from our ZA6 Drayton ZV Actuator. I confess to not understanding how these things work - but nudged it slightly and it stopped.
    A month later we have a power cut and the same buzzing noise has happened again when the power returned.
    I switched the heating off and then on again and it the buzzing has stopped for the time being.
    The heating seems to be okay - but I'm keen to understand what it causing the noise. When it is buzzing, if I press or hold the ZVA a certain way the buzzing stops, and starts again when I let go.
    Any idea - is it serious - or is it the motor inside that needs replacing?

    Thanks in advance
     
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